Four fire engines and around 25 firefighters tackled a fire on Ethnard Road in Peckham.
The fire occurred in a two-storey mid-terraced house. Part of a flat on the first floor was damaged by fire. There were no reports of any injuries.
The Brigade was called at 1257 and the fire was extinguished by 1356. Crews from Old Kent Road, Dockhead, New Cross and Deptford fire stations attended the scene.
The fire is being treated as accidental.